【摘要】 通过理论分析和数值模拟，研究了降水所致凝结潜热影响副热带高压带断裂的物理机制。基于全型垂直涡度方程的尺度分析指出，强的对流凝结加热的垂直梯度的变化，导致副热带地区对流层高层和中低层的高低压分布呈现出反位相。数值试验证实凝结潜热是决定东半球夏季副热带高压位置和强度的关键因素：东亚季风降雨所致凝结潜热加热使高层南亚高压位于加热中心西侧，中层西太平洋副热带高压位于加热中心东侧。通过定常波的传播，副热带地区的凝结潜热加热对中高纬天气的形成和维持有一定影响。更多还原

【Abstract】 The effect of condensation heating on the formation of enclosed subtropical anticyclonecenters is studied using theoretical analysis and numerical simulation. The complete form ofvertical vorticity tendency equation is employed for the analysis. It is found that, due to thevariation of the vertical gradient of strong convective condensation heating, the distributionof cyclone and anticyclone in upper troposphere is out of phase with that in the middle andlower level in the troposphere. This is confirmed by numerical experiments. lt is concludedthat condensation Leating is a key factor for the formation and location of summer subtropical high in the eastern hemisphere- The latent heating released by the monsoon rainfallforces the 200hPa South Asia high on the western side of heating center, and the 500hPaWestern Pacific subtropic high on the eastern side of the center. Circulation in mid-high latitudes is als0 affected by the latent heating in subtropical area through the propagation ofRossby wave.更多还原